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DPMS Colt style pivot pin replacement review

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  • DPMS Colt style pivot pin replacement review

    DPMS Push Pin Replacement for Factory Colt front Pivot Pin

    One of the major gripes I always hear from Colt owners is the front pivot pin requiring three hands and two screw drivers to take it out. Having only owned a few Colts over the years I never listened to their gripes that much. Well, that was until a few years ago. I inherited a post ban Colt from my brother after he died and I bought a registered receiver Colt SP1 in 2002 just before deploying to Kuwait for the upcoming Operation Iraqi Freedom. Shortly after I deployed my Form 4 was approved so my gun sat in a safe at my dealerís shop taking up space. Upon my return I was pretty anxious to pick up my new gun and head out. While I wanted to have a few different uppers for it, I found that the small hole uppers were a bit frustrating to deal with so I bought several SP1 uppers to remedy this problem (I have since had my lower converted to a small hole by American Manufacturing. Please see my review on Mikeís excellent work!) and did not think too much about it until I started doing several upper swaps at the range. What a pain in the ass! While a dime sufficed as a useful tool, you still could not just push out the pin and go. Plus, you have the screw to worry about dropping. How do I make this a bit more user friendly? Well, DPMS sells a pushpin replacement for the Colt large pivot pins. It is a very simple design. The pin extends past the receiver enough to be held in place by a spring ball detent type system yet it is easily pushed out without the help from tools of any kind. Now, what is even better is that the pin does not cost an arm and a leg. For less than $10, you can have one of these pins for your large pin Colt.

    You donít have a large pin Colt but you want to leave the tools at home? No worries, DPMS makes one for the small pin variety Coltís as well. The price runs the same and they are very easy and convenient to use. If you are like me, you lose everything you touch so buy two just in case. I have one in each of my uppers just in case.


    The photo above is the DPMS pin in front of a Colt SP1 (registered) that has been modified to small pin by Mike at American Manufacturing.

    There is another pin out there that I will be looking into as well. I saw it in Brownelles while browsing the other day. It is the same idea as the DPMS pin but has a push button release on the ball detent system. It comes with a higher price tag of course but I think it will give you guys more of a piece of mind when it comes to concerns about the loss of the pin. While the DPMS pin holds firm, I am sure some of you out there will be able to knock her lose and may lose it.


    The photo above is of the Colt SP1 lower with a large DPMS pin in an original SP1 upper.

    The .250 small pin unit has a flat side on the head of the pin so it will fit into all small pin lowers with a fence. This keeps your pins installed on the same side as a standard AR-15 type rifle so you donít have to fumble around with something new. The pin is also very useful in CAV Arms type lowers and rifles!


    This is the right side of the modified SP1 lower. Note the flat portion of the pin. This allows you to use the pins with lowers that have the raised portion for the standard pivot pin with detent and spring like CavArms and Colts.

    To purchase this pin, contact DPMS or you local DPMS dealer for pricing and availability.

    Large Pin A-15 Quick Take Down Pin PN: LR-QT $6.00 (Retail)
    Small Pin A-15 Quick Take Down Pin PN: LR-QT-S $7.00 (Retail)

    24 April 2004
    Scott A. Hyde
    AKA
    DrJekl, AR15.com
    Vulcan, Moderator, AR and M Forum, Assaultweb.net
    There is no I' n team!
    [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
    There are three types of people in the world: 1. Those that can count. 4. Those that can't.
    So, am I your man Mr. Dumbass? The name, is Dumaas!

  • #2
    sorry to hear about your brother, vulcan.

    good review.

    Comment


    • #3
      Thanks Bob.
      There is no I' n team!
      [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
      There are three types of people in the world: 1. Those that can count. 4. Those that can't.
      So, am I your man Mr. Dumbass? The name, is Dumaas!

      Comment


      • #4
        Got it up, thankfully the TN supreme court is long winded enough that I can get this done. Got the scope up as well.

        Comment


        • #5
          Can you post a link to the Ar15 review page?
          There is no I' n team!
          [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
          There are three types of people in the world: 1. Those that can count. 4. Those that can't.
          So, am I your man Mr. Dumbass? The name, is Dumaas!

          Comment


          • #6
            Great review, the pics show plenty of detail but might want to resize them a bit to make them more web friendly. [img]smile.gif[/img] Lucky you got your SP1 when you did. The class 3 stuff just keeps going up & up.

            Comment


            • #7
              Err, its in my sig line, but what the heck, anything to help a dyslexic CWO.... ar15reviews.com

              Comment


              • #8
                My only reservation about using the pin with ball detent is it's long-term effect on the receiver. Over time, it would seem to me that it would wear on the aluminum receiver and surface finish. Of course, how many times does one really need to remove the pin? I usually re-install the original two piece pin hand tight (finger, really) and haven't had a problem - it kind of deters you from removing it in the first place. Now, if I got this detent pin, I'd be more apt to seperate the receivers.

                Just my thoughts. Thank God we live in the USA and we have these difficult decisions to make.

                Comment


                • #9
                  I don't see how it could wear on the aluminum. The outer surface is hardened to protect from wear. You are talking a spring ball detent, not much pressure. Just enough to keep things in place but removable with about the same pressure as a standard pin.
                  There is no I' n team!
                  [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
                  There are three types of people in the world: 1. Those that can count. 4. Those that can't.
                  So, am I your man Mr. Dumbass? The name, is Dumaas!

                  Comment


                  • #10
                    Good info, Nice review.

                    Comment


                    • #11
                      Have you tried one of these?

                      http://www.brownells.com/aspx/NS/sto...N+TAKEDOWN+PIN



                      More secure and very easy on the lower. I have given away all my DPMS pins and use nothing but these now.

                      Comment


                      • #12
                        Yes I have. They do the same thing for more money. Neat design but the DPMS one does everything you need for $6 instead of $20. I am not sure how either one could be hard on the lower.
                        There is no I' n team!
                        [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
                        There are three types of people in the world: 1. Those that can count. 4. Those that can't.
                        So, am I your man Mr. Dumbass? The name, is Dumaas!

                        Comment


                        • #13
                          I have personally had the DPMS model move outward on me (must have unknowingly hit it) and a friends all most fell out (the ball bearing went south)!

                          The KNS can not be removed unless the button is first pushed inward (the opposed direction of removal).

                          They sell for $13 or less.

                          Comment


                          • #14
                            Move outward or fall completey out? Yes, they can be pushed in as there is about 3/16" that sticks out. The one where the ball fell out should have been sent back to DPMS for replacement as it was obviously a bad unit.

                            Nothing wrong with the KNS unit. They did not send one to get reviewed. I am sure the balls in it could fail too as anything can fail. Dealer cost is $11 on these and most I have seen at retail are at $20 though the SRP is $13.50
                            There is no I' n team!
                            [URL="http://www.cjcs-supply.net"]www.cjcs-supply.net[/URL]
                            There are three types of people in the world: 1. Those that can count. 4. Those that can't.
                            So, am I your man Mr. Dumbass? The name, is Dumaas!

                            Comment


                            • #15
                              I read your current thread concerning reviews.

                              Are reviews only kept active on this site based upon favorable activity (postings) vs. potential informational value (hits)?

                              I only mention this because a little over TWO YEARS ago I tried (In vain), to warn folks about the Gooch (Gary a SAI) and was told that I must be residing on the Moon as Gary was THE AK SMITH to contact based upon overwhelming internet endorsements (by this and other sites) !

                              LOL

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