Date: 19/2/2017 8:15
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Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

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PY-A-4386

1-year limited warranty

$37.99

List Price $42.99 Save $5.00 (11%)

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  • Description
  • Customer reviews
  • Q & A: 6 answered questions
  • Crosman .177-cal. steel breech kit
  • Fits Crosman airgun models 1377,* 1740, 1760 and PC77
  • Will accept the Crosman LPA MIM rear sight

The original rear sight that comes with any of these airgun models will no longer fit on the steel breech. If you want a rear sight, the Crosman LPA MIM rear sight is made for this kit (CR-2300-010[PY-A-4385]).

*This breech does not fit older model 1377 air pistols with a sliding breech cover.


In stock


Item Code: CR-1377SBPK [PY-A-4386]

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4.0 4.0

4.0 4.0

By dukeja from USA on 2016-09-14
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Things I liked: Longer breech and set screw to stabilize the barrel for better precision shots. Providing rails for various optics. Make 1377 more substantial in weight.

Things I would have changed: The "screw in" part of the bolt hand has poor QC or tolerance. It was actually too long to prevent the flange touches the bolt body. This makes the joint extremely weak and problematic. Many people mentioned the handle would unscrew itself during cocking due to the same issue. Within a week, mine has stripped thread due to creeping out and loading the cocking force. Friend of mine having machine shop who help me to restored the thread (8-32 thread) and take out the length of the screw part slightly so the flange sit well with the bolt. With some loctite, it should be even better than new!! I also wish that they have different version with weaver rail, so most red dot can be mounted without adapter.

What others should know: The install manual is horrible. Checking out some Youtube instruction will make it so easy in 5 minutes.

5.0 5.0

5.0 5.0

By John from USA on 2016-08-01
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Things I liked: Get this - it makes mounting a scope much more secure, makes the overall piece much better.

4.0 4.0

5.0 5.0

By David from USA on 2016-06-06
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Things I liked: Much smoother cocking action and the 3/8 dovetail .

Things I would have changed: The tiny Allen screw that holds the breech screws in lower than the breech causing the pellet to hang up just before the pellet enters the barrel.

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  • Colin from USA asked:

    So, I recently got an older American Classic 1377 (it has the sliding breech cover) and it won't hold air when I pump. I can't seem to figure out what I need to do in terms of replacement parts in order to get this old lady back up and running. Any thoughts? Thanks in advance!

    • Tony from USA asked:

      what is the dimensions of the Crosman short breech?

      • Robert from USA asked:

        What is the length of the long breech vs the short

        See all discussions

        Compatible with Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns

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