Hammer Extensions
Hammer Extensions
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Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
image
Hammer Extensions
Hammer Extensions
Hammer Extensions
Hammer Extensions
GTHM68, GTHM69, GTHM70, GTHM71, GTHM72, GTHM73, GTHM74, GTHM79, GTHM277, GTHM283, GTHM284, GTHM285, GTHM308

Hammer Extensions

Sale price$13.00
SKU: GTHM71
Select Your Hammer Extension:Browning BL-22. Astra 357 - GTHM71
Quantity:
warning

WARNING: Some of these products can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov

13 different hammer extensions to fit your firearm with an exposed hammer after you mount a scope.

Note: Due to the varying dimensions of hammers, minor fitting may be required. 

Select the correct Hammer Extension for your firearm in menu above. 

We do not recommend the use of our hammer extensions for applications not listed.

 

PART # FIREARMS FIT Hammer Slot Dimensions (W x H)
GTHM68 Winchester 94s and Big Bore 94s including angle-eject (except 94/22) and Ithaca X-caliber 0.360" x 0.139"
GTHM69 Winchester 94/22 0.315" x 0.125"
GTHM70 Marlin Lever Actions 1957-1982 0.320" x 0.094"
GTHM71 Browning BL-22, Astra 357 0.365" x 0.235"
GTHM72 Ruger Blackhawk, H&R Topper, New England Firearms Handi Rifle 0.315" x  0.238"
GTHM73 Browning BLR 1981-1991.  Does not fit 1992 & later models.  Not for use on folding hammers. Ithaca Tikka 12-70 over/under. 0.555" x  0.190"
GTHM74 All Marlin Lever Actions made in 1983 & later including 39A, 39M, 1894, 1894C, 1895S, 336C, 336T, 375, 444S, Glenfield 30A 0.375" x  0.094"
GTHM79 T/C Contender and S&W Model 29 (DOES NOT FIT T/C G2 Contender) 0.500" x  0.190"
GTHM277 Henry Big Boy, Pre 2010 models 0.300" x  0.187"
GTHM283 Henry Single Shot, Henry Big Boy Centerfire Rifles, Post 2010 models 0.306" x  0.109"
GTHM284 Henry 22 Pump and Lever Action rimfire rifles & Rossi 92/22 0.355" x  0.160"
GTHM285 Browning BLR 1992 -1995 Not for use on folding hammers. 0.630" x  0.208"
GTHM308 Model 36 Marlin (1936-1947) and Marlin 336 (1948-1956) 0.285" x  0.159"
NOTE: MINOR FITTING MAY BE REQUIRED - Not all hammers are made to exact tolerances. Sometimes you may need to lightly file the opening of your grovtec hammer extension to assure a secure fit. We recommend using a small metal file. You can also use some liquid bluing to re-coat the bare metal if necessary.

    Customer Reviews

    Based on 29 reviews
    76%
    (22)
    17%
    (5)
    0%
    (0)
    3%
    (1)
    3%
    (1)
    M
    Michael Atkinson
    5-star transaction

    Hammer spur fit better than expected. Shipped fast and great communication. American Made !

    K
    KDHCustomer
    Good feel

    Of the three hammer extensions I had found online, Uncle Mike’s, Grovtec and Ranger Precision, only the Ranger offering was available. So I ordered it. I’m guessing the popularity of lever guns of late was the reason behind Grovtec’s offering scarcity and I wanted a hammer extension “now”!
    Ranger hammer extension is fine but has a bit of ergonomic discomfort for me and has a rather aggressive feel for my thumb.
    Took advantage of Grovtec’s availability notice and ordered.
    World of difference for me.
    Very pleased!

    M
    Matt in Oklahoma
    Mounted right up

    Does exactly what it’s supposed to

    R
    Rex Wiley
    Works

    Works great fits great easy to install no problems would recommend

    R
    Ryan Zakovec
    Quality part

    GTHM70 is a perfect fit for my 1961 39a