TANDEMKROSS Ruger MKIV and MKIV 22/45 Blast Shield Installation Instructions
- Allows for safe removal of the magazine disconnect
- Facilitates proper magazine alignment
- Shields sear and hammer from debris, boosting performance
- Ruger® MKIV™ Standard
- Ruger® MKIV™ Hunter
- Ruger® MKIV™ Target
- Ruger® MKIV™ Competition
- Ruger® MKIV™ 22/45™
- Ruger® MKIV™ 22/45™ LITE
- Ruger® MKIV™ Tactical
- Ruger® MKIV™22/45™ Tactical

107 Reviews
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human
This guy is tough to install. you need 3 hands to do it since you have to push down on the piece in the pistol to install this.
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Great Accessory
Once I decided to remove my MkIV Hunter and 22\45 Lite's magazines disconnect, the TK Blast Shield, resembling the OEM's black spacer (without the mag dis. feature), works very well! It provides the needed spacing and clearance for the OEM hammer and also shields the hammer\sear contact areas from the rimfire debris. After 200 rounds, both the hammer notch and sear polished surfaces remained clean...amazing! However, due to the design of the Ruger hammer and my excessive lower dry-firing (w\o upper installed), the Blast Shield's right side sleeves are a little dinged up, but function perfectly!!
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Does not fit volquartsen hammer
Does not fit volquartsen hammers so I was not able to use this. Can’t say how good it is, But if you have a volquartsen accurizing kit this will not fit on the hammer.
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Awesome product!
Great product. Well built. Product worked and functioned well as described by manufacturer. Mark IV lite was running with no issues after product was installed. I highly recommend this product
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Phew
I am not mechanically inclined, but after a a bit of work, and a restart, I got the Blast Shield installed. I made one call to Tandemkross for help, they called me back. Great Support!! Love the way my Mk IV operates without the pesky magazine disconnect. Worth the price.
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Another nice upgrade
Great part that eliminates the pesky mag insert feature to pull the trigger. Now it feels like every other gun I own. Highly recommend. Thanks TK!!
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Works Awesome
I put in the magazine disconnect by following the video. Very simple instructions. Works awesome thanks for a great product
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Great part may require minor fitting
Great part that improves the function of the gun and even fills in some gaps that are left with the stock parts. My only issue was that initially the fit of the part was so tight to the hammer that it induced some failures to fire, but some minor sanding and polishing on the sides of the hammer and the inside Blast Shield corrected them. This probably would not have been an issue except that my Mark IV is brand new out of the box and never fired so it has not had any break-in yet.
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Retired
The Blast shield was easy to install in my Ruger MK IV 22/45 Lite. Great upgrade to my pistol. I would recommend it to all Ruger MK IV oweners.