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Gunsmithing Tips (40 FAQs)

Top 10 FAQs For This Topic

	How do I install the Harris Bipod Adatper?
	Barreling Uppers
	How are the gas rings removed and installed? Does it take a special tool?
	What is the best way to perfectly allign the gas tube with the carrier key? I had an unfired round go up high in the upper and it bent the tube out of spec.
	what size cup tip punch do i need for removal of the front sight housing?
	Assembling Lower Receivers
	Where can one find the correct grade of moly grease for the barrel nut? thanks
	What does it take to install a Bipod Stud?
	Is there a potential 'gas tube fouling' problem as I use the newer Wolf boxer primed ammo as plinking range ammo? It seems to be no more dirty than more expensive brands, but it feels a bit less powerful a load than factory Black Hills ammo of the same bullet weight. I hope I didn't miss this on your web site's Q&A page.
	What size punches are required for assembling the lower frame?

Recently Added FAQs To This Topic

	I recently picked up a Model XM15-E2S Serial #L087398 which is assume was made during AWB period of 94-04 as it has the fake, non moving collapsible stock. I want to replace the stock with one that truly functions. The large nut on the recoil spring tube at the back of the receiver, is that staked on ?? How difficult is that to remove?? Please advise, thank you. Bob
	I just purchased an AR15 sling end plate for my Post Ban M4 style rifle. The lock nut on the buttstock will not budge at all. I am using an AIM AR 15 combo wrench and almost stripped the notches in the nut. Any suggestions? Being that it is a Post Ban, is it meant for only a gunsmith to change out the stock so as not to put an illegal stock on it? Please advise.
	I'm havine trouble with my M17S bullpup double or tripple firing. I'll get 3 or 4 normal semi auto shots and then the weapon will cycle 2 or 3 times I purchased it new just after they were discontinued, but it has only been fired twice, all total it has less than 100 rounds through it. It displayed this problem the first time I fired it. I tried several different brands of new factory ammo. I also loaded rounds one at a time and fire 30 or 40 round through it that way incase it needed to be broken in but the problem persisted. I thoroughly cleaned and oiled and tried it again, but still have the same problem. I was thinking the sear might not be catching the bolt, but I don;t see any where on either (wouldn't expect to given how little use its seen) Any suggestions on where to start trouble shooting it?
	I have a friend that has a Carbon 15, I believe it is one of the Type 97's that was made before Bushmaster took over production when they were made by Professional Ordinance. I am considering purchasing it from him and I was wondering if you still have parts for this model and if needed if you still provide service for this model if the need would arise? I also have a Bushmaster XM-15 I purchased new in 1999 and I think it is an awesome firearm, no complaints about it at all. Thanks
	I have a CMP XM15-E2S and want to change the barrel, the FSB does not appear to be pinned on, is there a procedure for removing the front sight base? Or are the pins the just under the finish?
	bought bushmaster 2 stage comp trigger group, installed in panther lower, installed fine but can not get second stage release once set stop screw just past release, run second stop in to get 1st stage, try to set for second stage no release, adjusted many times, any tips on getting 2 stage? works great as 1 stage trigger but have same trigger on my bushmaster dcm rifle so i know how it should feel, can not get same result?
	I have purchased the 450 Bushmaster Upper. From another FAQ it was mentioned that the Daniel Defense Free Float rails would fit. However, the 450 Bushmaster barrell nut is for a screw on free float rail and is different than the AR15 barrel nut that are used with a Delta Ring. How does the 450 Bushmaster Free Float Barrel nut come off?
	I intend to order a telestock (1005-087-8988-PK) for my Bushmaster XM15-E2S. Will the TeleStock Wrench for new style (ribbed) TeleStocks (223-TELEWRENCH2) fit both the original (old) lock nut for removal and the new telestock lock nut? Also, does the Telestock Wrench have a screwdriver on the end for removal of the existing fixed stock screws? Can't tell from the picture. Thanks.
	Are there any negatives to building an AR-15 as opposed to buying a complete rifle? I have seen in other FAQ's where you refer to a home-built gun as a parts gun in other FAQ's. Is that a negative when it comes to future value or desirability. Does the prospective used gun buyer value the bushmaster parts gun less than the factory-built bushmaster? In addition, I don't see much of a monetary gain by buying the parts and assembling the gun as described in Ron Wu's "A PROSPECTIVE AR-15 OWNER/BUILDER'S PRIMER". I can't see the cost savings now that may have existed when he wrote the article in 1997. For example, $370 (Lower Receiver Assembly with Adj Stock, Pistol Grip, and internals) + $695 (16" Carbine M4 Upper - A3) = $1065. A Complete AR-15 A3 M4 Type Carbine is $1270 (savings of $205 but you still have to buy a case, mag, and sling). Am I missing something here?
	What grain bullet is the best to start with? As far as shooting goes with a Varmint Model .223.