Tikka ACE & UPR Length of Pull Kit — LOP Spacers for ACE / UPR

The Tikka ACE and UPR are built for precision — but factory length of pull isn't built for you. Whether you're shooting stages in a PRS match or adapting your UPR between summer and winter kit, LOP needs to be dialed in.

The Nokka ACE/UPR LOP Spacer Kit gives you up to 35mm of adjustable length of pull on Tikka's premium platforms. The kit includes three spacers - 5mm, 10mm and 20mm - designed specifically for the ACE chassis and UPR stock geometry; this is not a universal spacer forced to fit.

Open-frame design — built around the ACE pad adjuster

The T3x ACE butt pad uses a third, central threaded boss to slide the pad up and down for comb height. A solid spacer plate covers it. Ours doesn't: each spacer is an open frame — a perimeter ring with a large central window — so the pad's height adjuster passes straight through with room to spare. The outline, M5 mounting pattern, countersinks and stacking bosses are unchanged from the solid design; only the material in the middle is gone, which also makes each spacer around 40% lighter. The same window is cut identically on all three sizes.

Stacking rule for every LOP spacer: For every LOP spacer, use one spacer by default. Stacking any combination of LOP spacers can be done only in special cases, but a multi-piece stack does not create the strongest possible connection and is not our recommended default. If stacking is required, glue the spacer pieces together before final installation and use only the confirmed locating and fastening hardware for the setup.

What's in the box

• 1× 5mm spacer (0.2″)
• 1× 10mm spacer (0.4″)
• 1× 20mm spacer (0.8″)
• Extended fasteners for all configurations

Compatibility

Designed for Tikka T3x ACE Target, T3x ACE Game, T3x UPR, and T1x UPR. Works with both factory recoil pad and aftermarket pads including Limbsaver. On ACE stocks, the open-frame window is what clears the height-adjustable pad hardware — if you're running an ACE and want to check clearance against your exact setup before ordering, get in touch and we'll talk you through it.

Specifications

• Spacer sizes: 5mm + 10mm + 20mm (stackable to 35mm)
• Construction: Open-frame, purpose-built component
• Weight: ~60g total kit
• Mounting: Bolts between buttstock and recoil pad — no permanent modifications
• Made in Australia

A note on manufacturing

Nokka parts are precision 3D printed in Australia. As with any 3D-printed part, small cosmetic variations — faint layer lines or slight surface-texture differences between batches — can occur. These are normal for the process and do not affect fit or function.

If you've invested in a Tikka ACE or UPR, you already know that fit matters. This is the fastest way to get your LOP right without replacing the stock. Install takes under 5 minutes with a screwdriver.

Already have the standard T3x/T1x kit? This is a different product — the ACE and UPR use a different buttstock geometry and mounting pattern.