.450 Bushmaster vs. .458 SOCOM: Guide and Test Firing

Free Shipping on all .450 and .458 uppers 8/6 – 8/7!

BCA is the best!!!

I need a 6mm ARC BCA upper! I have a 458socom, and two 5.56. All side chargers. The 458 has taken a 160pound black bear so far. I want a 6mm ARC in a side charger. Do it!

How about comparing ft lbs of energy between the two and some accuracy comparisons. This video is like thousands of others like it. It shows some guy babbling on about the un important info and skips the important things like bullet expansion and penetration. And the desert is supposed to be watching someone blowing ammo down range.

Can I please have a free 450 bushmaster upper?!!

How well do the uppers handle these loads? Which is likely to cause less premature wear?

Will you guys build a left handed upper ??

I just discovered y’all 4 days ago. I bought four uppers and they arrived today! Super fast shipping. Can’t wait to run them. .458 socom was one of them along wit 300BO, 5.56 and 7.62 pistol uppers.

Thanks for the fast ship! Will be buying more!!!

Just got my 350 legend and 450 bushmaster barrels in from you guys!

http://www.bigboremag.com sells conversion kits for Gi Mil-spec mags and Polymer Hex mags, They work great too ! and you probably already have the magazines so for under $10.00 you have a big bore mag that works!

I have to say i LOVE you guys! I have purchased two of your uppers to date! My 1st was a 16" 7.62X39 upper and the last i had to go around the corner on the purchase since my wife was a bit bitchy about my hobby!LOL So i had to get my son-in-law to order it on his card and give him the money! LOL My last upper was a 6.5Grendel upper and i have yet to shoot it!:>/ but ill get it done! I have had it for almost a year now without even getting the chance to fire it as i live in a BLUE state! So of course once i sell my home and can buy some land(20to30acres) in a "FREE" state! I was thinking West Virginia since my wife wants to stay close due to her family being here in the hell known as New Jersey! So after im in a FREE state i can start to get some real toys! Im really sick of living in a state where a lot of companies wont mail AR15 related parts even much less complete firearms as other wont even mail ammo here!?! So as they let violent criminals out of prisons all over the country because of the fake C19 crap they want to disarm us all! Our "illegitimate" Government and president for that matter are doing their best to weaken the people of this great country! Im very happy that i found your company i can add to my collection of ARs! one in every caliber! The only two left are the 350Legend and 450Bushmaster! Just cant decide which to build next? lol

hey buddy i have to ask why you have the rear sight so far forward on the rail? I always put my rear sight behind any optic i use. The further apart the sights are the more accurate it should be…….no?

Please do the .50 Beowulf too. Tnx

Waiting on my 7.62×39 upper to arrive. Cant wait to put the ATN 4K on and shoot some piggies, very certain I will be ordering a 450 Bushmaster upper side charger also.😃😃😃

I love BCA!! 💯💯

Can I use any lower with these higher cal .450 or .458 socom ?

Can i shoot 450 and 458 out of the same upper? I keep getting conflicting answers on this

450,458,or 50 Beowulf for deer hunting

What’s the big idea with the price hike!! Cmon guys 😆

What could had caused my bushmaster to do that

My bolt on my 450.bushmaster back out on me

Do bear creek custom rifle as well

just purchased the 450 bushmaster im excited

Love bca but bear creek need to drop pins inside of the gas block of your 450.bushmaster or all of y'all big bore rifles

BCA: have you or will you ever consider building a 5.45×39 upper? I’d be first to purchase!

I've got 3 of your uppers they are top notch and a pleasant transaction

The notification just came through this evening.

Is is too late to return my complete upper that I purchased? Bought a side charger in May 2020. Had it returned because of feed ramp issues. Got the replacement in June 2020, a rear charging one this time. It shoots but I can't get it to cycle past the 4th round. I'd be lucky to get it past the 5th round. My lower is a multi cal Aero. PSA 2-stage trigger. Standard LPK. Nothing fancy. Still can't get it to fire reliably.

Can’t wait to get my 458 back from y’all. I’ve had it for over a year and it’s never been fired.. kept getting stuck and wouldn’t ever fully close. Sent it back about a week ago, hope to get it back soon.

Just got the video on 8/9 ,what about the free shipping 8/7????

any idea when 18in 350 legend complete uppers will be available again?

I'm new to the AR market do i need a special lower to shoot 458 or can i modify my 556 lower? If so what type of lower do I need or what do I need to do to my existing lower to fire 458 or 450