Date: 15/4/2021 1:9
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PY-A-4386

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

4.5 (92 reviews)
Crosman .177-Cal Steel

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$39.99

List Price $42.99Save $3.00 (6%)
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  • 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.


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

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Weight0.15 lbs

Average Customer Review

4.5 (92 reviews)
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3.0 3.0

2.0 2.0

Verified Purchase

Things I liked:

Provides a solid base for mounting optics.

Things I would have changed:

The breech screw is countersunk too far. When screw is installed there is a hole that the pellets cross over and get tilted. I am having to point the gun upward, place the skirt over the bolt and fiddle with it to get the pellet lined up properly with barrel. So it needs a filler of some sort in that space. For $40 I expected a more precise fit.

What others should know:

Bolt seems to have a lot of play. The fit of my plastic breech was better with the exception of not having dovetail.

5.0 5.0

4.0 4.0

Verified Purchase

Things I liked:

Ease of installation, nice fit and finish

Things I would have changed:

Nothing

5.0 5.0

5.0 5.0

Verified Purchase

Things I liked:

The steel breech has been a solid platform for the red dot that I mounted. The breech stabilized the barrel. Still, I was getting inconsistent target results and did not know if it was because of the red dot or the Crosman pellets I was using, purchased from Walmart. The types I purchased were Pointed, Destroyer, Hollow Point. More on this below.

Things I would have changed:

Cannot think of anything to change.

What others should know:

I'm using a Crosman 1377 indoors at 20 feet. The steel breech and an inexpensive red dot have given me a stable and reliable platform. The missing piece for me was finally getting reliable results from pellets. I ordered some Crosman Wad Cutters from Pyramid. That's the pellet that has been the missing link for my airgun. I am now very satisfied with the groupings that I'm seeing. If you are experiencing inconsistent results, try wad cutters. Now my question is: does Pyramid receive better quality Crosman pellets than does Walmart? There is an obvious difference in the performance of the pellets from these two merchants; however, I have never seen wad cutters at Walmart, so I haven't been able to compare exact types. Would like to hear a comment from Pyramid on this.

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  • elcue from USA asked:

    What adapter do you use to mount a red dot sight on the 1377 with the steel breach. I have bought dovetail to weaver adapters to mount a sight and they do not fit the dovetail. I for some reason I just realized it states in the description. (Does not fit 3/8", 11mm, Weaver or Picatinny dovetails/bases) Duhh on me! What is used to mount a red dot or scope if desired?

    • Jason from USA asked:

      Will this for the old 1389 backpacker?

      • Mark from USA answered:

        Compatible with Crosman .177-Cal Steel Breech Kit, Fits 1377, 1740, 1760 & PC77 Air Guns. No

    • Plinker50 from USA asked:

      Will this upgrade the older model with the sliding breech cover?

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