HOME > AR-15 > AR-15 UPPER PARTS >

MAS DEFENSE AR-15 UPPER RECEIVER - XL (.450 .458 .50)
MAS DEFENSE AR-15 UPPER RECEIVER - XL (.450 .458 .50)
 
Alternative Views:
MSRP: $85.00
Our Price: $74.99
SALE PRICE: $59.99

Price with Selected Options: $59.99

Stock Status: In Stock


Product Code: MAS00101210

Upper Parts Kit Option:



Qty:  
DESCRIPTION
 
MAS DEFENSE AR-15 UPPER RECEIVER - XL (.450 .458 .50)

*If you would like the upper to include an Ejection Door and Forward Assist please select the "COMPLETE UPPER" in the Upper Option drop down menu.

  • Enlarged ejection door for larger caliber rifles. .450 .458 .50 etc.
  • Material: Machined from 7075-T6 forged aluminum
  • Precision Machined to Mil-Spec Tolerances
  • Black Hardcoat Anodized Mil-Std-171 Type III
  • M4 Feedramps
  • .250” takedown pin holes
  • Accepts standard AR15 / M16 components
  • Weight: 8.35oz

RELATED ITEMS
16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL 10.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL MAGPUL AR-15 MOE GRIP - BLACK - MAG415-BLK 7.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL
SALE PRICE: $304.99
SALE PRICE: $286.99
SALE PRICE: $15.29
SALE PRICE: $281.99
16" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 12.62" M-LOK RAIL 10.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 9.87" M-LOK RAIL MAGPUL MOE GRIP - MAG415-BLK 7.5" 5.56 / .223 AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL
5.25" 9MM AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL FORGED CHARGING HANDLE AR-15 - DUAL PULL AMBIDEXTROUS GEN 1 M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT BCG - MELONITE NITRIDE
SALE PRICE: $228.99
SALE PRICE: $19.99
SALE PRICE: $79.99
5.25" 9MM AR-15 BARRELED UPPER - MAS DEFENSE NERO 7.25" M-LOK RAIL FORGED CHARGING HANDLE - DUAL PULL AMBIDEXTROUS AR-15 M16 BOLT CARRIER GROUP 5.56 & 300 BLACKOUT MELONITE NITRIDE BCG

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 14 CLICK HERE TO WRITE A REVIEW »

  0 of 0 people found the following review helpful:
 
5 of 5 Fantastic .450/.458 Upper Receiver September 13, 2023
: from East Stroudsburg, PA United States  
This is a great .450/.458 upper. It is perfect spec and the MAS Defense XL stamp was a very nice touch. I look forward to completing this build with a 10.5" .458 Socom barrel.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
4 of 5 Seams good February 22, 2023
: Twigster from Newberg, OR United States  
Fits in a aero lower with out too much movement. I’m not currently using it in a built at the moment so I just dry fitted all component except for a desk cover.
The Faxon barrel i have laying around slides in easily with some movement. The same barrel had a more tight fit with the other upper I bought.

I bought two ar15 uppers, this one with the extra milling clearance in the dust cover area so 450 & .458 cal cases can more efficiently eject & also has a forward assist, and a slick side.  I noticed that both receivers came from different forging houses and also have different ano finish textures. Which I find surprising if Mas is doing there own machining and sending them to the same ano place. This upper has a more similar finish to the aero precision finish. The slick side upper has a more doll & chalky finish. I like the price and feel there are of good value.

Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 September 2, 2022
: from Bluff City, TN United States  


Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 September 27, 2021
: James Willis from MURPHYSBORO, IL United States  


Was this review helpful to you?

  0 of 0 people found the following review helpful:
 
5 of 5 In Stock & Quick Shipping September 17, 2021
: Raven from MO United States  
MAS had the part I needed when no one else had it. The shipping was very quick indeed. Thanks.

Was this review helpful to you?

View All Customer Reviews