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M1 trigger group

shilowarshilowar Member Posts: 38,815 ✭✭✭
edited September 2013 in Ask the Experts
I have a post-war CMP SA M1 with an HRA trigger group. I've been offered to trade trigger groups with a guy that has a CMP HRA with an SA trigger group. Other than overall condition and function is there anything in particular I should look at too make sure its a good piece before I trade?

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    nmyersnmyers Member Posts: 16,881 ✭✭✭✭
    edited November -1
    Just check the locking lugs (round things that engage when you swing the trigger guard into place) to be sure that they aren't mangled or out-of-round.

    I would hope that both rifles are "service grade" or lower. It would be a shame to swap parts on a "collector grade" rifle, only to find later that the parts that you thought were mismatched were, in fact, "correct" on the rifle.

    Neal
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    CDMeadCDMead Member Posts: 2,141 ✭✭
    edited November -1
    A post war Springfield trigger housing should be marked 6528290 SA.

    The hammer should be marked either C5546008 (s/n 4,200,000 to 5,400,000 or so) or D5546008 (s/n 5,400,000 or above).

    The safety should be marked SA11 although some early pieces had U marked safeties (s/n 4,200,000 to 4,260,000). Some post war rebuilds seem to have used SA_11 safeties.

    As far as I can tell from the literature, there were no parts exchanges between Springfield and H&R.

    BTW - I would suggest a collector grade rifle, at least from the CMP, would have all manufacturer matching parts, so I don't see any issues about matching yours up.

    Good luck,

    Charlie
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    Emmett DunhamEmmett Dunham Member Posts: 1,418 ✭✭✭✭✭
    edited November -1
    It would be nice if the group was close to the finish, color of your Springfield.

    Emmett
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    shilowarshilowar Member Posts: 38,815 ✭✭✭
    edited November -1
    quote:Originally posted by CDMead
    A post war Springfield trigger housing should be marked 6528290 SA.

    The hammer should be marked either C5546008 (s/n 4,200,000 to 5,400,000 or so) or D5546008 (s/n 5,400,000 or above).

    The safety should be marked SA11 although some early pieces had U marked safeties (s/n 4,200,000 to 4,260,000). Some post war rebuilds seem to have used SA_11 safeties.

    As far as I can tell from the literature, there were no parts exchanges between Springfield and H&R.

    BTW - I would suggest a collector grade rifle, at least from the CMP, would have all manufacturer matching parts, so I don't see any issues about matching yours up.

    Good luck,

    Charlie


    Yeah mine is a service grade 5,79 mil SA...his is a5,5 mil HRA from CMP. I am waiting to hear back from him what grade his rifle is. Then if I could get an appropriate SA bolt my rifle would be all SA.


    I appreciate the info from everyone.
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    CDMeadCDMead Member Posts: 2,141 ✭✭
    edited November -1
    For a s/n 5.79 mil rifle the bolt should be marked 6528287-SA with a heat treatment code of either A14 (s/n 5,420,000 to 5,869,999), A15 (s/n 5,420,000 to 5,969,999) or Y01 (s/n 5,790,000 to 6,009,000). Any of those heat codes would be fine as parts were picked from bins and it wasn't necessarily "first in first out."

    Here's some on the auction side:

    http://www.GunBroker.com/Auction/ViewItem.aspx?Item=367121522

    http://www.GunBroker.com/Auction/ViewItem.aspx?Item=367505641 (The one on the left is an A14)

    Good luck,

    Charlie
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    shilowarshilowar Member Posts: 38,815 ✭✭✭
    edited November -1
    quote:Originally posted by CDMead
    For a s/n 5.79 mil rifle the bolt should be marked 6528287-SA with a heat treatment code of either A14 (s/n 5,420,000 to 5,869,999), A15 (s/n 5,420,000 to 5,969,999) or Y01 (s/n 5,790,000 to 6,009,000). Any of those heat codes would be fine as parts were picked from bins and it wasn't necessarily "first in first out."

    Here's some on the auction side:

    http://www.GunBroker.com/Auction/ViewItem.aspx?Item=367121522

    http://www.GunBroker.com/Auction/ViewItem.aspx?Item=367505641 (The one on the left is an A14)

    Good luck,

    Charlie


    sweet!!! Thanks for all the info!
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