PMT-15 Billet Pin & Weld 223/5.56 13.7" Upper

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These complete uppers have been assembled and test fired. They are ready to ship and are plug and play. These uppers are built with a 13.7” barrel that highlights precision accuracy over other brands. We pin and weld a Dead Air (keymount) muzzle device to make the barrel a legal 16” rifle length and ready for your suppressor. Simply snap this beauty onto your lower of choice and enjoy high performance that you can trust at an affordable price.


Our billet uppers are made from 7075-T6 aluminum. CNC machined featuring a very sleek profile. These uppers are impressively built to sustain heavy abuse.


The upper receiver is paired with a 13” 6061-T6 CNC machined billet handguard. The MLOK handguard features superior tensile strength and is designed to endure heavy impact without throwing your iron sights or optic out of alignment. The handguard mates direct to the upper and features anti-rotational tabs. The handguard is installed using our steel low profile barrel nut which requires no timing as it fits under the gas system.


The 13.7" barrel is produced from raw bar stock to finished product. The barrel is properly stress relieved after rifling, and extensions are torqued after nitride. Superior quality control system ensures that all barrels are dimensionally correct and bores fall well within their individual tolerance.


Barrel Specs: PAMAX Tactical Razor Barrel

Barrel Length 13.7″ - Pinned and Welded to legal 16”.

Barrel Weight 22.00 Oz

Barrel Material: 4150 CroMv Mil-B-11595E

Barrel Caliber 5.56

Barrel Profile: M4

Twist 1/7

Barrel Thread 1/2 x 28

Gas Block Size .750

Gas System: Length Mid-Length

Barrel Finish: Nitride

Barrel Extension Finish: Nitride


Features a Dead Air Keymount Muzzle Device for keymount suppressors.


The .750 adjustable gas block is machined from 4140 pre-hardened steel with H&M Black Nitride coating. The gas tube is machined from seamless stainless steel tubing. As always you have comfort that even the smaller parts are USA Made.


Features our ambidextrous charging handle made from 7075-T6 billet aluminum and milled to spec. A milspec forward assist and dust cover are also installed.


Build Overview Features:

7075 Billet Matched Upper Receiver

6061 Matched Billet MLOK 13" Handguard

13.7" Nitride 5.56 NATO Caliber Barrel ( Compatible with 5.56/.223 ammunition)

Dead Air Muzzle Device

Mid-Length Gas System with Adjustable Gas Block

Milspec Forward Assist

Milspec Charging Handle


All of our parts come with a warranty which we stand behind. These uppers are designed to withstand abuse, offer high quality USA parts, and outperform the competition, all while staying within an affordable price range.


2 Reviews Hide Reviews Show Reviews

  • 5
    13.7” pin and weld upper

    Posted by Ty on May 18th 2024

    I will start by saying that the original purchase was a little rocky with man power but the employees are amazing and very helpful. This uppers fit and finished very well. It paired nicely with my billet radian lower. Over the handguard angle is set very nice it holds well. The only issues is the upper, barrel, and handguard have a slightly different finish which is no big deal. Overall I would recommend this company and their products.

  • 5
    High tier rifle from an underrated company.

    Posted by Tyler on Jan 16th 2024

    I purchased this 13.7” billet upper with a nickel boron BCG since this only comes with a charging handle. A really nice ambi one at that. They emailed me a couple days later saying they could ship the upper sooner if they put an upgraded X-Slick coated BCG in it, free of charge. I’ll take it! I love the x-slick and realized quickly I should have spent the money on it from the start. Really nice coating, light years ahead of the nitride I’m used to. Incredibly easy to clean. I will say the fit and finish of the upper is higher end. Truly well built. I love the angular design of the receiver, unique and actually an upgrade to mil-spec in my mind. I hardly found any reviews for uppers from Pamax but I’m glad I pulled the trigger and took the risk. This mated to my PSA lower perfectly, absolutely zero wiggle or play. I took it out of the box, oiled and put my BCG in, slapped my Sandman S on the end and sent a magazine through it. Incredible function. Zero issues. Since this comes with a pin and weld dead air brake, I noticed they actually tuned the gas pretty damn close to perfect for suppressed use. It was throwing shells damn near perfect to what I prefer my suppressed AR’s to run. I genuinely couldn’t be happier. For the money, you’re getting a top tier upper right out of the box. Every part is well thought out and put together. I will say my only gripe, and this is minor, but the dust cover came a little looser than what mil-spec would normally have it. Not a big issue, I’m just used to the spring being tighter so it doesn’t flop around as much. Still functions perfectly, I just prefer the spring a little tighter. Easy fix though. All in all, I’d happily spend my money here again. This is a super underrated company that builds quality tools.