View Full Version : ar-10 trigger inquiry

04-17-2009, 10:34 PM
Hello all,

I may have asked this before but..

My understanding is that the ar-10 and ar-15 trigger group is the same except for the hammer and hammer spring. Is this true?

Also has anyone used an ar-15 hammer and hammer spring on their ar-10 and experienced any problems?

On a side note: Does anyone know where someone might have ar-10 hammers and hammer springs in stock for sale?

Thanks for viewing!

04-17-2009, 10:36 PM
I think I read that the spring and hammer needs to be stronger on the AR-10. I ordered a timney for my AR-10 and it came in pretty fast (couple weeks)...

04-17-2009, 11:39 PM
If I remember correctly, the AR10 specific hammer must be used if you have the Gen. 1 bolt carrier. If you have the later generation BC then an AR15 hammer is fine. I'm talking about the Armalite based rifle.

04-17-2009, 11:44 PM
Bolt Carrier Groups (BCG)

Here are some changes of the BCG over the years. As mentioned above, the 98-00 year model had a thin notch for the hammer. The middle aged version will work with all hammers. The newest version has had the bottom of the BCG milled to form a shallow "V". This allows the BCG to cycle without pressing down on the rounds in the mag as much providing for fewer malfunctions.