SKU: 55474138631

GROVTEC HAMMER EXTENSION

Sale price$22.45 Regular price$24.95
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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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Kristina
Massapequa, US
★★★★★ 4
Great value
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The engine air filter fit perfect. The cabin air filter was a bit of a challenge fitting. seemed to be a bit larger but it went in and got the cap back on the box. For the price you cant beat it. Would buy again!
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Reviewed in the United States on May 15, 2026
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Storyteller
Massapequa, US
★★★★★ 5
Great Filter Set for Allergy‑Sensitive Families and MPG‑Minded Drivers
Size: 21-25 TLX, 18-25 Odyssey
I bought this set because I prefer handling routine maintenance myself, especially cabin and engine air filters, rather than paying dealership prices for simple jobs. The package included one cabin air filter and one engine air filter, plus a full backup set for the next service interval. Both filters installed easily and fit the 2018 Honda Odyssey exactly as expected. No trimming, no forcing, and no alignment issues. The cabin filter seated cleanly in the glove‑box housing, and the engine filter dropped into the airbox without any airflow restriction or sealing gaps. This setup is ideal for Odyssey owners who want to maintain optimal cabin air quality—especially helpful for families with allergies—and for drivers looking to keep engine airflow unrestricted for the best possible MPG and throttle response. It may not be necessary for anyone who relies exclusively on dealership service or doesn’t perform their own maintenance. Overall, this is a straightforward, high‑value filter set that installs cleanly and supports both air quality and engine efficiency for DIY‑minded Odyssey owners.
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Reviewed in the United States on May 26, 2026
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Tom Crum
Grantham, US
★★★★★ 5
Auto air filters
Size: 16-22 Pilot, 14-16 MDX
Perfect - product great - installation easy and much cheaper than having dealer or auto shop do it ——
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Reviewed in the United States on May 30, 2026
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Efrain
Belleville, US
★★★★★ 5
Great
Good quality and price. Perfect size fit. Easy to install
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Reviewed in the United States on May 29, 2026
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Kaya
Birmingham, US
★★★★★ 5
Great Quality Filter and Perfect Fit for My 2022 CR-V
I bought this EPAuto air filter for my 2022 Honda CR-V 1.5L, and it couldn’t have been easier to install. It fits exactly like the original — snug and secure — and the whole process took under five minutes without any tools. Just open the air box, pull out the old filter, and drop this one in. The quality feels solid with a sturdy frame and well-made filter material. It’s not flimsy at all, and you can tell it’s built to last. After swapping it in, I noticed the engine felt a bit smoother, and there was a slight improvement in responsiveness, especially during acceleration. I’m also hoping it helps with fuel efficiency over time. Honestly, for the price and convenience, this is a no-brainer. It’s a simple upgrade you can do yourself that helps protect your engine and saves you money on dealership replacements. Highly recommended if you drive a newer CR-V like mine!
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Reviewed in the United States on July 24, 2025

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