Page 1 of 2 12 LastLast
Results 1 to 10 of 16

Thread: LMT bolt?

  1. #1
    Join Date
    Dec 2010
    Location
    LV NV
    Posts
    703
    Feedback Score
    0

    LMT bolt?

    Received from a trusted vendor a "new" bolt. Proof fired apparently, that's good. Marked MP, and that is good. Only other mark looks like a Cl. The rolled pin retaining the ejector is not flush with or below the bolts outer circumference. Since the packaging was a simple little plastic baggie I am wondering if I got a generic bolt for a premium price.

    Any parts experts wish to enlighten this soul?

  2. #2
    Join Date
    Feb 2008
    Location
    Washington
    Posts
    772
    Feedback Score
    0
    I just recently received direct from LMT an Enhanced bolt where the roll pin that retains the ejector is not set flush or below flush as it should be, it actually sits a little to high.

    Also, the roll pin itself is a coiled roll pin instead of a split roll pin that you would normally see used to hold the ejector.

  3. #3
    Join Date
    Sep 2012
    Location
    Washington State
    Posts
    545
    Feedback Score
    1 (100%)
    Do you have some high quality pictures, particularly of the gas key, screws and staking? I primarily use LMT BCGS in any ar15 I build, I could probably tell you from that alone.
    Nobody ever got shot climbing over the wall into East Berlin.

    Delivering the most precision possible, at the greatest distance possible, with the highest rate of fire possible.

  4. #4
    Join Date
    Sep 2012
    Location
    Washington State
    Posts
    545
    Feedback Score
    1 (100%)
    Quote Originally Posted by 556Cliff View Post
    I just recently received direct from LMT an Enhanced bolt where the roll pin that retains the ejector is not set flush or below flush as it should be, it actually sits a little to high.

    Also, the roll pin itself is a coiled roll pin instead of a split roll pin that you would normally see used to hold the ejector.
    Yep. The extractors almost always ride high from LMT.

    Haven't bought one in a while, but they also should ship with the crane o-ring separate from the bolt.
    Nobody ever got shot climbing over the wall into East Berlin.

    Delivering the most precision possible, at the greatest distance possible, with the highest rate of fire possible.

  5. #5
    Join Date
    Aug 2006
    Location
    USA (Washington DC/Northern Virginia)
    Posts
    715
    Feedback Score
    0
    Post a picture of the bolt body (side view of the bolt) including the area around the lugs. I will probably be able to tell you from that.

    Also, it will help if you take close up pictures of *both* holes for the ejector pin.

    The base model LMT bolts have been my "go to" bolts for years. So I am pretty familiar with them.

    Joe Mamma
    Last edited by Joe Mamma; 12-02-15 at 16:06.
    "Reliability above all else"
    NRA Certified Pistol and Rifle Instructor, Life Member
    Glock Certified Armorer
    Beretta & Sig Sauer Certified Pistol Armorer
    Colt Certified 1911 & AR-15/M16/M4 Law Enforcement Armorer

  6. #6
    Join Date
    Feb 2008
    Location
    Washington
    Posts
    772
    Feedback Score
    0
    Quote Originally Posted by Leuthas View Post
    Yep. The extractors almost always ride high from LMT.

    Haven't bought one in a while, but they also should ship with the crane o-ring separate from the bolt.
    I was talking about the roll pin that holds the ejector not being set flush or below flush, not the extractor.

  7. #7
    Join Date
    Sep 2012
    Location
    Washington State
    Posts
    545
    Feedback Score
    1 (100%)
    Quote Originally Posted by 556Cliff View Post
    I was talking about the roll pin that holds the ejector not being set flush or below flush, not the extractor.
    Gotcha. I read what I wanted to read, not what you wrote, I guess.
    Nobody ever got shot climbing over the wall into East Berlin.

    Delivering the most precision possible, at the greatest distance possible, with the highest rate of fire possible.

  8. #8
    Join Date
    Dec 2010
    Location
    LV NV
    Posts
    703
    Feedback Score
    0
    IMG_20151203_195444.jpg

    IMG_20151203_195527.jpg

    As per requests and as a clarification of which (LMT?) Bolt this might or might not be.

    Thanks to all for the responses

  9. #9
    Join Date
    Sep 2012
    Location
    Washington State
    Posts
    545
    Feedback Score
    1 (100%)
    Quote Originally Posted by 308sako View Post
    IMG_20151203_195444.jpg

    IMG_20151203_195527.jpg

    As per requests and as a clarification of which (LMT?) Bolt this might or might not be.

    Thanks to all for the responses
    I can say confidently that is indeed an LMT bolt. Two bands, correct pins, groove behind the lugs and both markings.
    Nobody ever got shot climbing over the wall into East Berlin.

    Delivering the most precision possible, at the greatest distance possible, with the highest rate of fire possible.

  10. #10
    Join Date
    Aug 2006
    Location
    USA (Washington DC/Northern Virginia)
    Posts
    715
    Feedback Score
    0
    I agree with Leuthas. It is definitely an LMT bolt.

    In addition to the relief cut around the lugs, the holes for the ejector roll pin are different on each side. If you look very closely, you can see that the hole in the lower pic is chamfered, and the hole of the other side in the upper pic is not.

    By the way, that roll pin goes in and out of only one side (the chamfered side). Also, that roll pin is shorter than many that are on the market. But it is the same length as a Colt uses. There are at least 2 different lengths of ejector roll pins that are commonly sold in the AR market. Colt and LMT (and probably many others) use the shorter ones.

    I have seen both coiled and spilt ejector roll pins in LMT base ("standard") model bolts.

    The sideways engraved "MP" and letters on the other side are the way LMT does theirs. You should know that sometimes the "MP" is flipped over. But it is always in that same area. Also, the area which says "Cl" can be other letters or just one letter. But the letter style (and size) on both sides is always the same as in your picture, and they are always engraved.

    Your bolt also has an ejector spring "bleed hole" (you can see the coils of the installed ejector spring) just like real LMT bolts. Some AR bolts do not.

    The machining on LMT bolts around the lugs and that end of the bolt is not always consistent (from bolt to bolt), and it is sloppy sometimes. So that shouldn't be a factor . . . but I always look anyway.

    By the way, although many new LMT base model bolts are test fired by LMT, I have received some (direct from LMT) that were not.

    I hope this helps. Let me know if you have any questions.

    [edited to add:]

    What do you mean by the following statement in your original post? Your ejector roll pin looks fine to me.

    Quote Originally Posted by 308sako View Post
    The rolled pin retaining the ejector is not flush with or below the bolts outer circumference.
    Joe Mamma
    Last edited by Joe Mamma; 12-04-15 at 10:26.
    "Reliability above all else"
    NRA Certified Pistol and Rifle Instructor, Life Member
    Glock Certified Armorer
    Beretta & Sig Sauer Certified Pistol Armorer
    Colt Certified 1911 & AR-15/M16/M4 Law Enforcement Armorer

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •