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XMG Belt-Fed AR-15/M16 Upper Receiver


Complete XMG Uppers are SOLD OUT


Receiver Packages Are Still Available. (See Below)



(This upper receiver may not be used on full-auto lowers unless by a C2 manufacturer.)


This durable milled steel upper receiver alters the method of feed from magazine-only to belt-only and the caliber to 8mm Mauser or 308. It requires no modification to your lower receiver. It simply clips on just like the standard AR-15 / M16 upper receiver. Each XMG comes complete with all parts except for the lower receiver. It is capable of semi-auto-fire-only operation with AR-15 and variant weapons and selective-fire with M16 and variant weapons but may not be used on transferable machineguns. It has a cycle rate of 700-1000 rounds per minute. Original MG34 selective fire components and bolts cannot be introduced to the XMG configuration. The XMG is fed from MG34/42 50-round flexible, metal belts, two or more of which can be joined end to end.

Its design is based on the MG-34 and it utilizes some parts from the MG-34. Most important are the bolt head, barrel, feed cover/tray, and muzzle parts.






Shown on MG-34 Sustained Fire Kit

8mm XMG ($3800) SOLD OUT
Includes complete Upper Receiver for use with your semi-auto lower receiver (ffl required) FREE SHIPPING in lower 48

308 XMG ($4200) SOLD OUT

Includes complete Upper Receiver for use with your semi-auto lower receiver (ffl required) FREE SHIPPING in lower 48


All XMGs come with:
All parts necessary to mount on your AR
Spare Firing Pin Hardware
Spare Buffer Discs
Limited Lifetime Warranty

Add MG3 AA Mount Modified for XMG:  $275, $175 if you already have the adapter

Add MG3 Ground Mount with Optics Modified for XMG:  $650




XMG Receiver Package ($1900)(ffl required): 

 It includes the XMG receiver, bolt carrier assembly with charging handle, firing pin, buffer assembly and all parts necessary to mount on your AR. To complete the assembly, it requires original MG34 bolt head, top cover, feed tray, mainspring, barrel and shroud assembly, buttstock, and ejector plate




Show on Modified MG3 AA Mount:  $275




XMG Shown on Modified MG3 Ground Mount with Hendsoldt Optics:  $650 (includes adapter kit installed on XMG and tripod)



Shown on AA Mount with BRP 34 to 42 adapter:  $185



SVD Side Rail Mount:  $100 (scope not included)

Original, un-cropped photograph used for the ShotGun News article of April 5, 2010.  
This excellent photo of an XMG taking down drones at Big Sandy was graciously supplied by:
Richard MacLean, www.MacLeanTech.com.


One XMG just isn't enough. Shown on a modified MG3 double mount.




MG-34 / XMG 308 Conversion ($700 for all parts)

• Newly manufactured barrel with original barrel collar ($465)
• 2 caliber feed tray with removable spacer that can be used for both 8mm & 308. ($150)
• Reduced diameter booster cone ($35)
• Front Feed Pawl that can be used for 8mm & 308 ($30)
• Link guide attached to feed tray ($15)

This setup will enable the MG-34/XMG to use WW2 belts, 308 belts, or M60/M13 links


34308ft.jpg 308 Feed Tray with M13/M60 Link Guide:

How It Works 
Once the original feed block is modified to assist 308 feeding, it will continue to function with 8mm as well. At this point, simply switch the quick-detach barrel and feed tray to your desired caliber. Since 308 is a lower-pressure round than 8mm, you may want to replace the 8mm booster with the 308 booster to increase the cyclic rate. Be careful not to use the 308 booster when firing 8mm.


1) Recuperator / Short-Recoil Piston Spring (new production): $10
2) Bipod (WW2): $125
3) Buffer Springs (bellevilles): $0.50 ea
4) Booster Cone (original or reduced diameter for 308): $35
5) Charging Handle: $20
6) Front AA Post/Sling Swivel: $40
7) Bolt Roller Spring Clip (the part that holds the rollers to the bolt / new production): $8 ea 
8) Bolt Ejector Pin: $25 
9) Firing Pin Assembly: $35, $30 for 2 or more
9) Firing Pin Anti-Slam-Fire Spring: $2.50
9) Firing Pin Rear Polyurethane Bumper w/ Washers: $4.00
10) Complete Bolt Assembly: $375
11) Extractor (with spring and plunger) : $35



XMG Transit Chest: $300



From Customers


"I am enjoying my new gun. I have shot it in both the 308 and 8mm configurations without any problems. The 308 was outside, and I shot 8mm indoors. The sparks were flying off the traps!!!! "


"I just received my XMG 34 last week. My six sons and I were able to go to the range on Saturday and we put 42 fifty round belts through the XMG and it ran flawlessly. We had a great time. Thank you very much for delivering an excellent product." - Michael R. L., M.D. in North Carolina 1/9/2006








email: info@brpguns.com

phone: 301-807-5234