450Bushmaster.net

These 20" National Match Heavy Barrels in the .450 (Thumper) caliber give the Hydra Modular weapon system one more "BIG" head and the ability to hit as hard as ever. Nicknamed "The Thumper," the new 450 is the most radical cartridge ever chambered in production AR-15 type firearms. Hornady, who is producing this new round of ammunition, brings this big bore performance to the most popular semi-automatic rifle in America — opening a whole new world of hunting to the battle-proven platform. The engineer design team built the cartridge to wring every last ounce of performance from the AR-15 without sacrificing any strength or reliability. Well suited to hunt any North American game, the .450 Thumper will quickly become a favorite of bear country guides. By simply switching your barrel and bolt in your MGI modular weapon system, you can go from the prairie dog towns of South Dakota to bear country in the north woods! The .450 Thumper fires Hornady’s 0.452” 250 gr. SST-ML featuring Hornady’s Flex Tip™ technology. The overall cartridge matches the 223 Remington at 2.250”, but uses a specially designed magazine which works perfectly in the standard AR mag well of the Hydra. The SST’s sleek profile makes for surprisingly flat trajectories and tremendous downrange energy. Put it all together, and you have a cartridge that gives your MGI Modular Weapon system a serious attitude adjustment!

wildcatter wrote:Couple of quick thoughts...The 450 is and always has been a SAMMI Spec Cartridge/Chamber. SAMMI is the industry regulator in the standardization arena in all things we here are interested in. A SAMMI Spec Cartridge, and/or, a Chamber Spec, is what makes for what some might call "Factory Ammo" anything else is a wildcat cartridge and thus non-factory, or again, a Wildcat. The vulnerable 50beo and the great 458s are in fact wildcats, in that, they are not SAMMI Approved.. SAMMI has nothing to do with patent rights, assuming I understood your question correctly..As for MGI, they have been around for awhile with their 450 mods. I looked up and read the previous url referrals and it looks like MGI has some dissatisfied customers, who knows, they just might make an excellent product, I have no experience with them? But the tremulous amounts of their questionable quality barrels, makes their single digit production amounts not worth the battle.. What do they say..oh yeah..something about..Imitation and Flattery?..wink

gunnut wrote:I do like their idea of a quick change barrel!!.... Reminds me of the M-60, Which holds a place in my heart.

wildcatter wrote:Couple of quick thoughts...The 450 is and always has been a SAMMI Spec Cartridge/Chamber. SAMMI is the industry regulator in the standardization arena in all things we here are interested in. A SAMMI Spec Cartridge, and/or, a Chamber Spec, is what makes for what some might call "Factory Ammo" anything else is a wildcat cartridge and thus non-factory, or again, a Wildcat. The vulnerable 50beo and the great 458s are in fact wildcats, in that, they are not SAMMI Approved.. SAMMI has nothing to do with patent rights, assuming I understood your question correctly..As for MGI, they have been around for awhile with their 450 mods. I looked up and read the previous url referrals and it looks like MGI has some dissatisfied customers, who knows, they just might make an excellent product, I have no experience with them? But the tremulous amounts of their questionable quality barrels, makes their single digit production amounts not worth the battle.. What do they say..oh yeah..something about..Imitation and Flattery?..wink

jagermaster wrote:How can I get the SAMMI Specs or If you have it can you post them