Introducing the new AR45 upper!
.45 ACP remains one of the most popular pistol rounds for good reason: Its low velocity offers forgiving felt recoil and excellent sound suppression, while its massive diameter makes up for its speed to offer high takedown power.
It only makes sense that the AR platform now chambers .45. This heavy-barreled 4.5" AR45 upper includes a custom billet receiver, reinforced with thicker side walls and machined with an enlarged ejection port.
Mil-spec pivot and takedown pinholes allow this upper to fit any standard AR-15 lower equipped with a .45 ACP conversion block, or any dedicated AR45 lower.
What’s Included
This is not a firearm. This AR45 upper includes a barreled assembly. Monolithic .45 ACP bolt sold separately.
AR45 Upper Specifications
Upper is assembled in-house and shipped ready to install.
Barrel
- Chamber: .45 ACP
- Contour: Heavy
- Length: 4.5”
- Twist Rate: 1:16
- Gas System: Blowback
- Muzzle Threads: .578 x 28
- Material: 4150 CMV
- Finish: QPQ Nitride
- Process: Button Rifled
- Lining: Nitride
- Muzzle: A2-Style "Birdcage" Flash Hider
Handguard
- Attachment System: 4" M-LOK
- Finish: Type II Hardcoat Anodized (Mil-Spec)
- Top Rail: M1913 Picatinny
- Material: Billet 6061-T6 Aluminum
- Attachment: Free-Float, Barrel Nut
Upper Receiver
- Profile: "Slick Side" Enhanced w/ Enlarged Ejection Port
- Material: Billet 6061-T6 Aluminum
- Finish: Type III Hardcoat Anodized (Mil-Spec)
Lower receiver not included. Requires AR45 lower, or AR-15 lower with .45 ACP conversion block.
WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or "assault weapons" (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily.
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
- Caliber:
- .45 ACP
- Barrel Size:
- 4.5"
- Barrel Finish:
- Nitride
- Twist Rate:
- 1/16
