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Questions Regarding Upper Receivers (213 FAQs)

Top 10 FAQs For This Topic

	Will a Bushmaster upper receiver match up with my Colt lower?
	How is the Gas Piston System different?
	I have a Colt M16A1 (full auto) Lower Receiver, will your gas piston upper (or conversion kit) work with a full auto lower? (I'm concerned that the bolt differences might be a problem).
	Will the Bushmaster gas piston retrofit conversion kit work for a Colt M4 Carbine with 16" barrel and the "A" style front sight? If so, once installed, could the B.M.A.S. Split Four-Rail Handguard for Carbines also be installed?
	I want to buy another bushmaster upper receiver in same caliber .223, will the bolt I have now fit?
	what are the m16 parts that are not suppose to be in a civialians gun?
	Will you be developing a Gas Piston Operating System in 6.8 SPC?
	Will a 6.8mm upper fit on a Predator 5.56mm lower?
	Will you be adding a gas-piston conversion kit for mid-length gas systems?
	I just purchased a Bushmaster Varmint. Was wanting to buy another upper receiver to change to a more Tac (car) model. Any suggestions?

Recently Added FAQs To This Topic

	Will a bushmaster 6.8mm upper fit on a S&W M&P15 lower
	I have a Bushmaster M4A3 carbine with removable carry handle. I think this is a stupid question, but how do you remove the "removable" carry handle? Do I need any special tools to do this?
	Can your .308 rifle be converted to a .223 by simply changing out the upper and putting a magazine block in the magazine well?
	CAN I BUY A COMPLETE UPPER ASSEMBLY IF I LIVE IN CALIFORNIA.
	I have a Bushmaster Model XM15-E2S. Will the 7.62x39mm Carbine M4 Type Upper Receiver will fit the lower receiver of my AR?
	I purchased a BURA3B-16F upper assembly from Midway. It arrived with no manuals or paperwork other than the invoice from Midway. The Midway stock number is 935289. Are there any markings on the upper assembly to let me know this is a Bushmaster upper? How do I know I got the real thing? Thanks, George
	I have a Bushmaster 20" A-2 purchased new in late 1999. Looking to replace upper receiver with A-4. Did this model come with A-4 Feed Ramps/barrel? Just want to make sure new receiver is compatible with original barrel etc...Thank you.
	I would like to mount a Bushmaster AR 15 flattop to a Colt M16A1 Full Auto lower. Is this possible without many alterations or do I have to change the bolt and buffer spring as well?
	we just bought a bushmaster upper 6.8spc and went and bought a box of Remington ammo . the problem is it won't eject the shells after they are fired you have to manually eject them I check to make sure that the gas block was not plugged and even put a vacuum hose on the gas tube while it was installed and blew threw it with no problems what else can it be I read that some ammo has this problem but at 35.00 a box you think it would be good stuff
	I just recently acquired a 6.8mm SPC bolt carrier group but the firing pin is missing. I hear the bolts are different, but can I use a firing pin from a 5.56mm on a 6.8mm bolt?