300 HAM’R – Power, Precision, and Performance in an AR Platform
The 300 HAM’R was engineered to deliver optimal terminal performance in a standard AR rifle. Designed to rival the effectiveness of the legendary .308 Winchester, it even surpasses the ballistics of the iconic .30-30 Winchester – America’s most popular hunting cartridge of all time.
When compared to the 300 Blackout at 200 yards, the 300 HAM’R dominates with:
18% more retained velocity
40% more energy
56% flatter trajectory
This translates to superior accuracy, harder-hitting downrange power, and flatter shooting – all while maintaining low recoil in a lightweight AR platform that uses a standard 5.56 bolt carrier group (BCG). For added convenience, this assembled upper receiver includes the BCG.
Backed by Over a Century of Craftsmanship
With more than 100 years of barrel-making expertise, Shaw Custom is trusted by leading firearm manufacturers and shooters worldwide. Known for uncompromising quality, Shaw barrels are the benchmark of accuracy and reliability.
Precision-Built for Maximum Performance
*Each 300 HAM’R Upper is assembled with meticulous attention to detail*
Components torqued to exact Mil-Spec standards
Chamber and headspace verified for safety
Upper receivers trued and barrels bedded for accuracy
Gas systems tuned and test-fired with the included bolt carrier group
Ready to attach to your AR 15 Lower Receiver
The result is a rifle upper that’s reliable, precise, and ready for the hunt or the range.
2 Reviews Hide Reviews Show Reviews
-
300 HAM'R upper
Everything with the order and working with Patriot arms and Supply went without a hitch. The upper itself is fantastic. It looks great and is very accurate. Not a single problem with functioning. If you wish your 300 B.O. had that extra velocity, this is your answer. SAAMI approved cartridge and brass is available. Nickel cases are even available from Wilson Combat. Perfect East coast Whitetail set up. From my experience, you won't regret the money spent in the slightest. Very satisfied.
-
.300 Ham’r Upper
Bore scoped it when I took it out of the box and it exceeded my expectations. Did the barrel break-in yesterday and was pleased with the ease of cleaning due to only slight tooling marks and smooth rifling. Shot MOA afterwards at 100 yards with 26.5 gr of CFEBLK behind 135gr FTXs and Speer Bonded. If you don’t want to break the bank, you can’t go wrong with this upper.
