SKU: 55474138631

GROVTEC HAMMER EXTENSION

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Description

GROVTEC HAMMER EXTENSION13 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)

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 & Savage Revel .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.

 

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 55474138631

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SAM
Houston, US
★★★★★ 5
My dogs favorite toy so far in two years
Color: C) 4" 2-Pack (Bacon)
I use this with my medium sized dog. These are large for him but that's what I want so I don't ever have to think about them being too small or a swallow hazard. He has been through A LOT OF TOYS in the last couple years, but nothing, NOTHING has he loved as much as these. His favorite used to be squeaker balls. Then his favorite was crackle balls. But he will gladly ignore both for this one. I don't know if it's the bacon flavor or what, but he go nuts for it.
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Reviewed in the United States on May 5, 2026
M
Verified Purchase
Matt B
Charlottesville, US
★★★★★ 5
Bacon? IDK but good stuff either way
Color: C) 4" 2-Pack (Bacon)
What is there to say? they're giant 4" rubber balls from the Chew King brand which is very durable brand. The best part is they don't roll under couches, side boards, etc cause they're just big enough.
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Reviewed in the United States on April 24, 2026
T
Verified Purchase
Tina
Cuba, US
★★★★★ 5
Durable, bright and bouncy
Color: H) 2.5" 3-Pack (Beef)
Love these. Color is bright so I can find it in grass and dirt. Quality is good! Works well in a Chuck it. Love these holes for whistle sound as it’s in the air. No scent cost is awesome for all 3 in pack
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Reviewed in the United States on December 30, 2025
I
Verified Purchase
Intuit
Grantham, US
★★★★★ 5
Tough Dog Balls. Bright Orange/holes for treats
Color: B) 3" 2-Pack (Bacon)
I used to buy Starmark. But their balls got smaller and tore more easily. The color was green. I couldn’t find it when it was dropped in the grass!! Soooooo, I took a chance on this cuz it had holes in it and was bright orange. It is not scented at all or its bacon scent faded. The ball is for strong chewers. I’m a petsitter and I needed tough balls for my clients dog. Shipped quickly. Good price. Exactly as described
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Reviewed in the United States on August 16, 2025
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Verified Purchase
Teresa M. Campbell
Massapequa, US
★★★★★ 4
Worthy chew and fetch ball.
Color: L) 3" 2-Pack (Chicken)
Durable and dog loved to gnaw on it. Bright yellow color easy to keep track of for both dog and parent!
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Reviewed in the United States on February 16, 2026

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