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G3 Bolt Locking Piece - Original HK Part Made in Germany for the G3

G3 Bolt Locking Piece


(Out of stock)

  • G3 Bolt Locking Piece - Original HK Part Made in Germany for the G3 G3 Bolt Locking Piece - Original HK Part Made in Germany for the G3

Quick Overview

Just about every time I am assigned another G3 part to describe, it is like I am back in school all over again – ready to hit the books and learn something new. Sure there are those few times when I get a part like the G3 hammer or the G3 sear and I don’t have to stare at it for 20 minutes while scratching my head to figure out what it is and how it works. Then there are those other times; times like today, when I pick up the G3 bolt locking piece and scramble to discover its purpose along with all the intricacies that come with it.

After examining the part, doing some quick research and checking out a PTR91, I’ve come to the conclusion that the G3 bolt carrier group is a beautifully designed machine. The bolt head, locking rollers, bolt locking piece, firing pin and bolt carrier all fit together to form a metallic puzzle that works almost flawlessly. I could talk about it all day long, but today we’re here to focus on the G3 bolt locking piece.

The G3 bolt locking piece is located inside the bolt carrier. After cocking the G3 and readying it for fire, the bolt moves into battery. This is made possible by the bolt locking piece. As the bolt carrier group moves forward, stripping a cartridge from the magazine and pushing it into the chamber, the bolt locking piece is thrust forward into the bolt head and serves to force the locking rollers outward into small recesses. This ensures that the bolt remains locked into place during battery and until the firing sequence is initiated. Once a cartridge is fired, the bolt head is forced to the rear. This also forces the locking rollers inward and moves the bolt locking piece out of place until the cycle repeats. Additionally, the bolt locking piece serves as a guide for the firing pin. It is a lot to conceptualize, but in general, the G3 bolt locking piece manipulates the locking rollers and allows the bolt to move in and out of battery while serving as a guide for the firing pin.

Without a G3 bolt locking piece, your G3 won’t work as it utilizes a roller-delayed blowback system of operation. Keep an extra locking piece on hand to ensure your rifle remains in top-notch working condition for the low price of $7.95.

Availability: Out of Stock



The G3 bolt locking piece is located inside the bolt carrier on the G3 rifle. By pressing against the bolt locking rollers as the bolt carrier moves forward – forcing them into small recesses – the bolt locking piece serves to lock the bolt in place while the rifle is in battery. It also aids in releasing the bolt from battery and acts as a guide for the firing pin. It is an original factory part made in Germany by HK.

Spare parts are an important consideration when it comes to firearms. Like any machine, firearms rely on a series of parts to function properly, including the bolt carrier group. If a part breaks or fails, a repair or replacement is necessary.

It is also important to consider availability. At this time, has a wealth of authentic, original factory parts from HK for the G3/HK91/PTR91. Not only are they readily available, but also they are cheap. Now is the time to take advantage.

Additional Information

Manufacturer No
Free Shipping N/A
Brand H&K
Gun Model HK 91, HK G3, PTR91
Construction Steel
Condition Excellent
Manufacture Status Original Item
Returns Accepted Yes - Must Not Be Modified Or Visibly Used
91 3 100 0
  1. keep the beast running review by Michael on 1/10/2014

    This is one part that you will experience wear on. Once it wears down, it will not lock your rollers properly. That could go really bad for you. It a good idea to replace your rollers at the same time so the fit is perfect.

  2. Better than what I had review by RemMax on 5/2/2013

    I just got mine in today and dropped it into my G3, the cocking piece I received was definitely not new and showed some signs of heavy use in its life but it is still a hell of a lot better than the one I had in my gun and it didn't cost me $28.00 to buy like a new one does.
    In my case I don't shoot my G3 very often so I'm happy with it.
    On the other hand if the G3 is the only 308 you own then this may not be the best way to go as they are from used rifle.
    Overall though these are well worth the price and I am satisfied enough with mine that I'm keeping it.
    I'll take it to the range sunday and I am pretty sure my G3 will function a lot better with this replacement part than the worn out part it replaced.

  3. original hk g3 locking piece review by joshua on 2/1/2013

    great buy like new h&k locking piece

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