PMT-15 RETRO PIN & WELD M4 Style 14.5" Rifle

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This PAMAX Tactical Inc. Retro M4 Style offers the sleek M4 with a 14.5" Rosco Barrel that we Pin & Weld with a flash hider.  A beautiful sleeper piece that we built with our billet lower as the core. We added a milspec forged upper to keep the retro look and added M4 furniture. Features a fixed frame front sight. We added a removable carry handle with the rear sight and retained the milspec dust cover, forward assist, and charging handle. This is a true retro "sleeper" and is packed with an XSLICK Coated M16 Profile BCG to provide easy cleaning, and a hand tuned 3.5lb trigger with anti-walk pins.

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


Our in-house machined AR15 billet lower/upper receivers are machined from a solid brick of 7075-T6 aluminum to provide a higher quality tier over 6061-T6. All of the critical features and dimensions are cut in a single operation, ensuring that every receiver is perfectly in spec. We then broach the magazine well for a perfect magazine fit, hand deburred, and tumble before coating. These builds also have an integrated ambidextrous bolt catch, offering a functional and sleek feature. The receiver bolt catch holes are threaded for included screws, eliminating your standard roll pin. The rear detent is also retained by a threaded cap screw making maintenance a breeze.

The upper receiver is a milspec forged upper with type III military anodizing.


The upper receiver is paired with an M4 handguard utilzing a delta ring assembly which is set in place along with the fixed front sight post. The barrel is milled in-house and then pinned.


14.5” M4 5.56 NATO Bloodline Barrel (Mid-Length): This 14.5” M4 5.56 NATO Mid-Length barrel was designed around the USASOC specs for an Improved Upper Receiver Group with a little bit of the Rosco touch as well. The longer gas system allows for a smoother gas curve which leads to managed dwell times. This combo creates a great balance of speed and performance.


  • Barrel Length 14.5″
  • Barrel Weight 26.34oz
  • Barrel Material 4150 CMV
  • 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 Crown:11 Degree
  • Barrel Finish:Nitride
  • Barrel Extension Finish:Nitride


Properly Built. No Corners Cut. 100% USA Made. Lifetime Guarantee. The BCG is a critical component with the most moving parts. We designed these BCG to run and run hard. Better yet, it features our proprietary XSLICK coating to increase cyclic rate, decrease friction, provide ease of cleaning and offer better resistance to heat and the elements. 

BCG Specs:

8620 M16 style carrier with XSLICK Finish

Properly heat treated

Final grind before plating

9310 or S7 5.56/.223 bolt

Heat treated

Shot peened

H&M Black Nitride finish


4140 billet gas key

Properly seated with Grade 8 fasteners

Properly staked to ensure reliability

4140 Cam Pin nitride treated for wear resistance

Billet Machined Extractor

Machined from solid 4140 bar stock, heat treated and shot peened

Phosphate coated for reliable extraction

Extractor insert included

O-Ring included

Firing pin precision machined from 17-4 H-900 Stainless Steel

100% USA Made


PAMAX Tactical Billet Ambi Charging Handle


Retro Flash Hider


The .750 Fixed Front Sight Post.


Contained within the lower we use 100% USA Made parts, all the way down to the very spring and detent. The trigger is our hand-tuned FCG. The remaining milspec parts kit are made from 8620 Steel Phosphate coated. We tune all our triggers at installation to ensure a crisp, no-slop, trigger pull. The fire control group features a 3.5LB trigger pull and is secured with a set of our anti-walk pins. The pistol grip is an A2 pistol grip.


A mil-spec forward assist and dust cover are installed. 


Carbine Buffer Tube System, billet 7075 buffer tube with a retro carbine stock.

Build Overview Features:

  • PMT-15 7075 Billet PAMAX Tactical Lower Receiver
  • 6061 Forged Upper Receiver
  • M4 Midlength Handguard
  • 14.5" 5.56 NATO Caliber Barrel ( Compatible with 5.56/.223 ammunition)
  • XSLICK Gold BCG 
  • Flash Hider Muzzle Device
  • Mid-Length Length Gas System w/Fixed Block
  • Anti-Walk Pins
  • Tuned Trigger - 3.5LB
  • A2 Pistol Grip
  • (1) 20rd Magazine
  • Milspec forward assist
  • Ambi PAMAX Billet Charging Handle
  • Carbine Buffer System
  • Retro Carbine Stock
  • Detachable Carry Handle w/Rear Sight


*** Please note, this is a restricted item and must ship to a Federally licensed gun dealer. Item will ship with a copy of our FFL for your dealer records. You will have an opportunity to upload a copy of your dealer's FFL at checkout. If you do not have a copy, simply have your dealer email a copy to along with the order number. Your order will not ship until we have a copy of the receiving dealer's FFL on file.