80% Builds

80% Arms Easy Jig Gen 2 Review

For anyone building their own AR10 or AR15 from an 80% lower, a good jig is an absolute must. I’ve tried several, but I have a new favorite.

In this 80% Arms Easy Jig Gen 2 review, I completed several different AR15 lowers from different manufacturers and made of different materials. And, even though I tried, I couldn’t find any significant fault with the system.

80 Percent Arms Easy Jig Review

If you have an AR10 or AR15 lower waiting for completion this review will be of interest to you. So, let’s not waste any time and jump right in.

The Easy Jig Gen2

Making an AR15 is one of the most popular homemade firearm builds today. Even so, a lot of people are hesitant because of the perceived difficulty in accomplishing the task.


You Asked, They Delivered: The PF940CL 80% Pistol Frame

Polymer80 announced a new Glock-compatible 80% pistol frame called the PF940CL. This new user-completed frame combines a full-size slide and barrel with the company’s short grip. The result is a gun with a longer sight radius and increased velocity with the improved concealability of a compact handgun.

(Ed. note: The above photo is of the PF940CL and is from Polymer80. The other photos are of me building and shooting a handgun made with a prior generation Polymer80 frame.)

The Basics

The new Polymer80 PF940CL is a non-firearm part that can be finished by the end user to make a functioning handgun. It is fully compatible with “3 pin” Glock parts.

Polymer80 PF940CL

When completed, the gun will safely shoot 9mm, .40 S&W or .357 SIG depending on the slide and barrel assembly you install. Slide assemblies for the G17, G17L, G22, G24, G31, G34 and G35 pistols are all compatible with the frame. This means you can run a long slide on one of these frames if you like.

While the top of the frame is full sized, the grip portion is cut down to the compact length for easier concealment. Since Glock magazines are fully compatible within a pistol series, you simply use a Glock-compatible compact magazine in this gun. For example, you would use a Glock 19 magazine with a Glock 17 slide assembly.

[Don’t miss my review of the Glock 17.]

Some people might question the usefulness of this setup. However, a chopped grip with a full length barrel has been popular for decades.

For concealed carry, the extra grip length of the full size pistol increases the likelihood of printing. A shortened grip length reduces this possibility while still allowing you to carry a respectable amount of ammunition: 15 rounds in the 9mm.

When Can I Get One?

Polymer80 says it expects to begin shipping the new 80% frames around the beginning of October, 2018. I expect initial demand to be strong, so finding one at launch may be a bit difficult depending on how many Polymer80 can get into the pipeline. I expect plenty to be available in time for Christmas.

What’s Included?

Unlike some companies, Polymer80 is good at including almost everything you need to complete the receiver and turn it into a working gun.

Polymer80 Glock Frame

In the kit, you will get an 80% frame plus the company’s locking block and rear rail system. Also included are drill bits and an end mill. The drill bits and end mill are needed to make the necessary holes and remove material to make this a legitimate receiver.

Whoa – Did Someone Say Ghost Gun?

Wait…you mean that the Polymer80 PF940CL is one of them ghost guns?

Well, without getting into a detailed explanation of why it is completely legal to build a firearm for your own personal use, yes – this kit will (with your labor, tools and the missing Glock parts like a barrel and slide) allow you to build your own pistol.

Big Notable Caveat: It is completely legal to build your own gun under US federal law. Some states in the US might have their own laws that govern this. Likewise, readers outside of the United States are likely to run into issues.

For more on this topic, I’d suggest reading my article on the legality of building and owning your own gun without serial numbers.

My Thoughts

I’ve built a Polymer80 gun in the past, and I highly recommend that others try it out for themselves. I found the creation process was enjoyable. The final result was quite pleasing.

Unlike the pistol I built, this one is improved with rear metal rails. My pistol was an older design with the rear plastic rails. These required a great degree of hand fitting. The new system on the Polymer80 PF940CL is superior.

Polymer80 Glock pistol

The photo above shows me shooting my personally owned and made Glock compatible pistol that uses an earlier generation Polymer80 frame.

These kinds of kits run about $150, though I’ve occasionally seen them go on sale. By the time you add in the finishing parts, you are not saving much money (if any) on a factory Glock pistol.

However, if you enjoying building things, I found the price is more than worth it. Before it fell off of my fishing boat, it was a great shooting pistol.

Last Update: October 23, 2022


Polymer80 is not an advertiser nor have they “sponsored” this article.*

I have no business interest in any firearm manufacturer and accept no advertising from them. In fact, you will not find any pop-ups, pop-unders, auto-playing videos or other annoying foolishness on this site. is a for-profit website. I do not charge readers a dime to access the information I provide.

Some of the links on this page and site are affiliate links to companies like Amazon and Palmetto State Armory. These links take you to the products mentioned in the article. Should you decide to purchase something from one of those companies, I make a small commission.

The links do not change your purchase price. I do not get to see what any individual purchases.

*Sponsored articles are often nothing more than a direct payment for a site to publish an article about the product in question. Sometimes the article is even written by the company and not by the website publishing it.

There are quite a few sites that take the money and publish the content without ever disclosing this to their readers. Be careful where you invest your time.

80% Builds

SS80: 80% Glock 43 Compatible Frame

Magill’s GlockStore announced the introduction of a new 80% Glock compatible pistol frame: the SS80. This is a subcompact frame that allows you to build a Glock 43 style pistol at home.

The SS80 is the first G43 compatible 80% frame on the market. It is also one of just a few Glock compatible 80% frames available.

SS80 Glock 43 frame complete gun shooting

What It Is

GlockStore’s SS80 is a glass filled polymer frame that is commonly referred to as an 80% frame or 80% lower. An 80% frame is an unfinished frame that requires finishing work done before it can be a functioning firearm.

SS80 Glock 43 frame

In the case of the SS80, you will need to remove portions of the polymer frame using a file or Dremel tool and then make four holes with a drill. Once this is done, it can be considered a firearm frame. Until then, it is legally just a hunk of plastic. It can be shipped straight to your door without the need to pay an FFL transfer fee.

The SS80 is not a Glock frame. Rather, it is a frame that is compatible with Glock 43 parts. This means that GlockStore set it up with a different look and feel than the G43. A few of the features of the SS80 frame include:

  • stippling-like grip texture for improved control of the pistol when shooting
  • frame and trigger undercuts in the trigger guard to allow for a higher grasp on the pistol
  • compared to a G43, the SS80 has a longer beavertail
  • metal rails that are longer than factory

When completed, the SS80 frame will accept single stack Glock 43 magazines and other standard parts. It will assemble like a factory G43 pistol.

SS80 Glock 43 frame kit

Included in the SS80 kit is:

  • polymer jig (the bright green “box” the frame goes in)
  • SS80 frame
  • locking block and metal rails (no polymer rails) plus pin for rear rails
  • drill bits needed to finish the frame

The suggested retail price is $150. At the time of this writing, the GlockStore has it on sale for $129.99.

Yes, these are made in the United States of America.

What It Is Not

The new SS80 is designed for G43 parts only. You cannot use it to make a .380 ACP chambered G42 clone.

Additionally, it is not a double stack frame that would allow you to build a G26/27 type pistol. However, Polymer80 is working on one of those and is expected to introduce them at the 2018 SHOT Show. Click this link for more information on the Polymer80 P940SC 80% frame.

Building Your Own – Parts & Tools

GlockStore put together a series of instructional videos that show you exactly how to finish and build the SS80 into a functioning firearm. I’ve followed the company’s other videos on building a Glock clone, and I have found them to be easy to follow. Also, the videos are professionally produced. You get clear sound and detailed images.

Some of the tools that you will need:

  • vise (optional, but makes things easier)
  • hand drill (optionally, you can use a drill press)
  • Dremel tool (optionally, you can use a file or knife but these will be slower)
  • WD40
  • fine grit sandpaper
  • finishing files

Once the lower is completed, you will need some additional tools to install the Glock compatible parts into the frame to build the functioning firearm. A set of punches and light hammer can help with assembly.

Building Your Own – Legal Issues

At the time of this writing, a citizen of the United States can build his or her own firearm for personal use without a license under federal law. This firearm does not need to have a serial number, be registered or be transferred through a federally licensed firearms dealer under federal law. I have no way of knowing what the law will be in the future, so please govern yourselves accordingly.

SS80 Glock 43 frame kit

State laws vary greatly, and you should definitely check with your local and state authorities on the legality of building your own pistol for personal use.

If you intend to build a firearm to sell or give away, you must have a license per federal law. This does not preclude you from building your own firearm and later trading it, selling it or giving it away as long as it was not built with that intention.

For additional information on the legalities of building your own firearm and requirements for serial numbers, check out my article “Am I Required to Apply a Serial Number to a Homemade Firearm.”

Final Thoughts

I’ve had a lot of fun building my own guns in the past. This kit looks like a solid 80% frame kit, and one that I will probably tackle at some point. I own a Glock 43, so I already have plenty of magazines that will run in this gun. It might be an interesting project to compare a completed SS80 vs a factory Glock 43 pistol.

Have you built an 80% gun? If so, sound off in the comments. I’d like to hear what people are building out there.

SS80 80% frame kit

Last update: October 23, 2022


GlockStore is not an advertiser. I do not have any relationship with them other than having been a customer of theirs. I receive no compensation for writing about this Glock 43 80% frame. is a for-profit website. I do not charge readers a dime to access the information I provide.

Some of the links on this page and site are affiliate links to companies like Amazon and Palmetto State Armory. These links take you to the products mentioned in the article. Should you decide to purchase something from one of those companies, I make a small commission.

The links do not change your purchase price. I do not get to see what any individual purchases.

80% Builds

Am I Required to Apply a Serial Number to a Homemade Firearm?

Building your own AR-15 from an 80% lower has become a popular hobby. Of course, there are many other firearms you can build from scratch as well: everything from a 1911 to a 10/22.

Firearm manufacturing is a highly regulated industry, and everyone wants to stay within the bounds of the law. So, what is, and is not, legal when making your own gun?

In this article, I am addressing one specific question: Do you have to engrave a serial number on your completed firearm?

Read This First

Before I go any farther: I am not a lawyer and have no specialized knowledge of the law beyond what anyone else can research. Nothing in this article should be considered legal advice. To put it in perspective, I’m just a guy with a keyboard – but then, so is that guy on Reddit or Facebook handing out advice. Carefully source your own information.

None of the information in this article applies to state or local laws. It applies only to the federal laws of the United States. Additionally, this information applies only to non-NFA items. All NFA items require serial numbers and other markings.

Laws change. At some point in the future, the laws regarding homemade firearms may change and render this information obsolete. Do your own homework and err on the side of caution.

Please note: the laws and ATF rules have changed since I wrote this article! Be sure to read the section at the end on the ATF serial number requirements for a look at the current state of things.

Am I required to apply a serial number to a gun I manufacture?

Short Answer: No

Long Answer: My research indicates there is no federal law or regulation that requires a person to mark his or her personally manufactured firearm with a serial number or other information. I had this confirmed by the Firearms Industry Programs Branch of the Bureau of Alcohol, Tobacco, Firearms and Explosives (BATFE).

Building an AR from an 80 lower

Additional Information

Federal law does not prohibit an individual from making a fully functional firearm for his or her own use. Further, you do not need a federal firearms license (FFL) to manufacture the gun. Refer to 18 U.S.C. 922 (firearms crimes) and 18 U.S.C. 923 (firearms licensing) in public law. The BATFE acknowledges this here.

However, you cannot make the gun with the intent to sell or otherwise transfer the gun to another. This prohibition includes making a gun as a gift for an immediate family member. However, building a gun for yourself that you later decide to sell or transfer is permissible. I would strongly urge caution, as the practice of making a gun for another is prohibited without a license. It would be up to you to prove that you made it for yourself and then later decided to sell or give it away.

I’ve never been able to find any reference in federal law to a serial number or other manufacturing marks being required on a personally made firearm. When I contacted the BATFE about this in December of 2016, Firearms Enforcement Specialist L. Babbie of the Firearms Industry Programs Branch in Washington DC stated:

Additionally, although markings are not required on firearms manufactured for personal use (excluding NFA firearms), owners are recommended to conspicuously place or engrave a serial number and/ or other marks of identification to aid in investigation or recovery by State or local law enforcement officials in the event of a theft or loss of the privately owned firearm. (emphasis added)

I have never found any credible information that contradicts Specialist Babbie’s statement. Keep in mind this is all referring to federal law – not state law. Individual states may pass laws that require serial numbers on home made firearms.

personally built firearm markings

What about a gun I make for myself and later transfer?

Short Answer: No

Long Answer: My research indicates there is no federal law that requires a personally made firearm that was manufactured for personal use to have a serial number of other marking before you sell or transfer it to another person. However, the BATFE muddies the water on this one because of the way they phrase certain things, and that people do not read the underlying CFR referenced by the agency.

However, when directly questioned about the requirement, BATFE has stated that no serial number is required in this specific case. I suggest reading the additional information below.

Additional Information

This answer is disputed by some gun owners, though it seems clear to me.

Federal law does not prohibit the transfer of a homemade firearm to another person so long as the gun was not made with the intent of transferring it to another person. In other words, when you made the gun, if it was your intention to keep and use it yourself then it is legal to later sell, gift or trade the gun to another person and not be in violation of the manufacturer licensing requirements in federal law.

This information was also confirmed by Specialist Babbie:

A person who previously made a firearm for personal use is not prohibited by law from selling such firearm. Such seller needs to ensure that he/she is actually selling a firearm that was previously made for personal use and that he/she is not engaged in the business of manufacturing without a Federal firearms license (FFL).

The gun may be transferred in any of the normal ways including face-to-face sales within a state (where not precluded by local law), through an FFL or by passing of the weapons to an heir.

However, Specialist Babbie was careful to note:

Making a firearm to gift to someone is not making a firearm for personal use.

In other words, you cannot make your son a hunting rifle and give it to him for Christmas unless you hold an FFL.

So, since it is obvious that transferring a personally made firearm is legal, let’s address the question of what, if any, marking requirements are there on a gun being transferred. This is where the BATFE causes confusion.

I have been unable to find any public law or CFR that requires a serial number or other marking on a personally made and owned firearm that is later transferred. None.

However, the BATFE makes the statement here that:

Receivers that meet the definition of a firearm must have markings, including a serial number. See 27 CFR § 478.92 (Firearm manufacturers marking requirements).

Unfortunately, the BATFE does not link to the regulation for people to review. I suspect that few people take the time to look up 27 CFR § 478.92. But I have and it can be read her.

The regulation states quite clearly:

You, as a licensed manufacturer or licensed importer of firearms, must legibly identify each firearm manufactured or imported as follows…

As someone who is not an FFL holder who is making a gun at home and for your own personal use, this CFR simply does not seem to apply.

I have seen an image of part of a letter that is presumably from the BATFE on this subject that further confuses the subject. In the letter signed by Sterling Nixon, Chief, Firearms Technology Branch, Nixon makes the statement:

…a nonlicensee may manufacture a semiautomatic rifle for his or her own personal use…However, if the firearm is transferred to another party at some point in the future, the firearm must be marked in accordance with the provisions set forth in 27 CFR § 478.92 (formerly 178.92).

Since the words “must be marked” appear, people sometime assume that means the personally made and used firearm that is now being transferred must be marked. However, the full statement includes “must be marked in accordance with…27 CFR § 478.92”, which clearly only applies to FFL holders. In other words, as I understand it, not placing markings on the gun would not take you out of compliance with 27 CFR § 478.92, so long as you did not otherwise fall under the requirements of the CFR.

I confirmed this through a series of e-mails with Specialist Babbie when I asked this question:

For clarification, if I (not a licensed manufacturer or importer) make a firearm for personal use and at some later date I decide to sell it, am I required to have it marked with any information? If so, what information would be required?

Specialist Babbie provided this clear and unambiguous response:

Firearms markings are only required by those who are licensed importers, licensed manufacturers, and those who make an NFA firearm for personal use. Those marks would be made at the time of import, manufacture, or when an NFA firearm was made for personal use. Under Federal law, no markings would be required in your circumstance. (emphasis added)

So, with the following information:

  • no law I’ve been able to find or seen cited requiring a serial number or other marking;
  • no CFR I’ve been able to find or seen cited requiring a serial number or other marking; and
  • a BATFE Firearms Enforcement Specialist saying no serial number or other marking is required

it seems fairly clear that no serial number or other marking is required on a firearm that you personally made for your own use that you later decide to transfer.

Again, I urge extreme caution. The presumption in law is that you need an FFL to manufacture firearms for sale to others. It would appear that you need to be able to prove that the personally made gun was for you and used by you and not intended for transfer to another person.

Should I apply a serial number to my gun anyway?

Short Answer: Yes

Long Answer

There are two good reasons why you should consider marking your gun in accordance with 27 CFR § 478.92 even though it is not required. First, it avoids any confusion about the application of 27 CFR § 478.92. Consider this a CYA, though I don’t think it to be a strong enough reason for me. I have no intention of ever selling, trading or otherwise transferring any gun that I may make to someone else.

The second reason, however, is much more important to me. Marking your firearm with a serial number and other information will allow it to be identified as a stolen firearm if it is ever taken from you. Firearm thefts happen, and a serial number allows local law enforcement to enter the weapon into the National Crime Information Center (NCIC).

When an officer comes across some gang banger with your gun, that serial number will come back as stolen. The thug in possession will go for a felony and the officers might be able to track back and find out who broke into your home. Cops getting criminals – especially violent ones – off the street is something I fully support. A serial number on your gun can help that happen should it ever be stolen.

Additional Documentation

This is the initial e-mail I sent to the BATFE seeking clarification on the issues surrounding the manufacture and marking of personally made guns:


This is the response I received:


I then followed up with this question:


and received this response:


ATF Serial Number Requirements – Update

This year has been wild for ATF rulings, changes and lawsuits. Currently, the ATF is attempting to enforce its new rules regarding what constitutes a “receiver.” Many people believe the new ATF rule is both illegal under the existing Federal law and unconstitutional from both the 2nd Amendment and the Separation of Powers clause.

Lawsuits are flying and at least one judge made a determination that the application of any serial number to a firearm may be unconstitutional. [Do NOT rely on this as a criminal defense!]

Right now things are fluid, and I would recommend doing your own research and contacting an attorney for any questions you may have. Do not take anything in this article as legal advice!

Last update: October 23, 2022